Article
Engineering, Electrical & Electronic
Qais M. Al-Bataineh, Riad Ababneh, A. Bahti, Areen A. Bani-Salameh, Carlos J. Tavares, Ahmad Telfah
Summary: Silver-doped zinc oxide nanostructures with different silver content were synthesized using a hydrothermal technique, and their structural characteristics, hydrogen-related defects, and electrical properties were characterized through annealing and analysis. Increasing the amount of silver doping not only increased the electrical conductivity, but also decreased the bandgap energy.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
P. Sathish, N. Dineshbabu, K. Ravichandran, T. Arun, P. Karuppasamy, M. SenthilPandian, P. Ramasamy
Summary: The structural, optical, surface morphological, and antibacterial properties of undoped and Ga-doped ZnO nanoparticles prepared by a combustion method were explored. Ga doping was found to significantly enhance the antibacterial activity of ZnO nanoparticles.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Ahrong Jeong, Koichiro Suekuni, Michitaka Ohtaki, Byung-Koog Jang
Summary: The study focused on fabricating indium- and gallium-doped zinc oxide ceramics and analyzing their crystal structure and microstructure to understand the relationship between different compositions. It was found that doping with In and Ga promoted the solubility of Ga and led to the highest power factor obtained at 1046K. Additionally, doping with In and Ga reduced the thermal conductivity at temperatures between 340-530K.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Xiaojun Wang, Qi Xiao, Zhenhua Pan, Swarnava Nandy, Xiaoping Tao, Xizhuang Liang, Lihua Lin, Junie Jhon M. Vequizo, Daling Lu, Takashi Hisatomi, Wei Yan, Tsuyoshi Takata, Kazunari Domen
Summary: The photocatalytic activity of rod-like Ga-doped La5Ti2Cu0.9Ag0.1O7S5 particles is determined by the particle length relative to the charge carrier diffusion length. In this study, Ga-LTCA particles with a rod-like structure were prepared, but the activity was lowered due to degradation of crystallinity during ball-milling treatment.
Article
Multidisciplinary Sciences
Hieu T. Hoang, Dai Cao Truong, Nguyen Huynh Tuan Anh, Yoshiyuki Kawazoe, Do Duc Cuong, Bach Thang Phan
Summary: First-principles electronic structure and Boltzmann transport calculations were used to study the electronic and thermoelectric properties of Ga-doped ZnO (GZO). GZO showed similar behavior with pristine ZnO, except for the position of Fermi level which was affected by the additional electron. It is suggested that controlling the Ga concentration can optimize the power factor of GZO.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Analytical
M. Toma, R. Domokos, C. Lung, D. Marconi, M. Pop
Summary: This article describes the influence of deposition parameters on the structural, morphological, optical, and electrical properties of ZnO thin films doped with Ga and co-doped with (Ga + Nd). The thin films were fabricated using RF magnetron sputtering with a power of 100 W and a deposition distance of 6 cm. XRD analysis was used to analyze the influence of doping on the film structure. Optical transmission measurements showed a decrease in transparency when dopants were added, and AFM analysis revealed that the type of doping affected the microstructure of the films. Raman and resistivity measurements confirmed successful incorporation of dopants into the ZnO host material.
ANALYTICAL LETTERS
(2023)
Article
Physics, Condensed Matter
Wei Zhang, Xinhui Yang, Zhiwei Qu, Zirui Liu, Youjin Zheng, Xiangmin Zhao, Xue Wang
Summary: The optical and electrical properties of Ga-doped ZnO powders are significantly influenced by the annealing atmosphere. GZO annealed in Ar, N-2, and H-2 atmosphere exhibits excellent electrical resistivity, while GZO annealed in O-2 atmosphere shows poor electrical resistivity. The emission characteristics of GZO are related to oxygen vacancy and Ga doping.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Multidisciplinary
Yufeng Zhang, Wenxiong Zhao, Qiuchen Wu, Xinlu Lin, Ziyao Zhu, Ruchun Li, Yuhang Liu, Kai Huang, Xiangxin Liu
Summary: The properties of Ga doped ZnO (GZO) film, a promising alternative to ITO film, degrade when deposited under oxygen-rich conditions. The degradation has been investigated by varying oxygen partial pressures during film deposition. XRD results reveal that the contraction of the lattice parameter-c in GZO films is caused by increasing concentrations of Zn vacancies (V-Zn) upon introduction of oxygen. The impurity phase of Ga2Zn6O9 appears and disappears in GZO films with increasing oxygen partial pressures, which leads to conductivity decay and a decrease in optical bandgap.
Article
Chemistry, Physical
Feng Gu, Shu Wang, Chen Zhang, Xue Yu, Ji-Bing Sun, Ying Zhang, Chun-Xiang Cui
Summary: The addition of low melting point Ga alters the crystallization process and microstructure of Nd13.65Fe74.15B5.6Co6.6 ribbons, resulting in improved glass-forming ability and enhanced magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Yangfei Zhu, Yong Wu, Fa Cao, Xiaohong Ji
Summary: In this study, Ga-doped ZnO (GZO) thin films with excellent transparent conductive properties were prepared by atomic layer deposition (ALD) at low-temperature. The influence of doping concentration on film performance was investigated, and it was found that the surface morphology, orientation, and electrical properties of the GZO thin films were highly dependent on Ga concentration. The GZO film with a Ga doping concentration of 1.16 at.% exhibited the highest carrier concentration, lowest resistivity, and highest quality factor.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Riccardo Freccero, Serena De Negri, Gerda Rogl, Georg Binder, Herwig Michor, Peter F. Rogl, Adriana Saccone, Pavlo Solokha
Summary: The chemical bonding and physical properties of La2Pd3Ge5 and Nd2Pd3Ge5 compounds were analyzed, with both showing metallic-like behavior.
INORGANIC CHEMISTRY
(2021)
Article
Environmental Sciences
Yasir Zaman, Muhammad Zahid Ishaque, Yasir Yousaf, Muhammad Shahzad, Abu Bakar Siddique, Muhammad Imran Arshad, Muhammad Sajid, Nisar Ali, Ghulam Nabi
Summary: Dilute magnetic semiconductor Zn1-xCuxO nanorods were prepared and their physical properties, antibacterial activity, and photocatalytic activity were investigated. The dopant concentration influenced the absorbance spectra and crystallinity of the nanorods. The Cu-doped ZnO nanorods exhibited ferromagnetic behavior and showed efficient photocatalytic degradation of methyl orange dye under visible light. The nanorods also demonstrated antibacterial potential, with smaller size nanorods being more effective against gram-negative bacteria. However, a slight decrease in catalytic potential was observed during recycling experiments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Ceramics
Qiuzi Luo, Yihua Sun, Jin Guo, Jiangyu Zhang, Liang Fang
Summary: This study investigates the effect of Ti doping ratio on Ti/Ga co-doped ZnO nanopowders. The results show that low Ti doping content enhances the absorption of visible light and catalytic degradation ability, while high Ti doping content reduces the recombination of electron-hole pairs.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yuechan Li, Yongli Li, An Xie
Summary: Doping impurities into zinc oxide can effectively tailor its optical properties, with synthesized zinc magnesium oxide and zinc magnesium boron oxide nanoparticles at different doping ratios. The study showed that magnesium and boron dopants had significant effects on the crystallinity and surface morphology of zinc oxide, without altering its wurtzite structure.
Article
Chemistry, Physical
Nur Amaliyana Raship, Siti Nooraya Mohd Tawil, Nafarizal Nayan, Khadijah Ismail, Anis Suhaili Bakri, Zulkifli Azman, Faezahana Mohkhter
Summary: The influence of doping and co-doping process on ZnO films was characterized, showing successful incorporation of Gd and Al ions into ZnO lattice. The films exhibited high transparency and red-shifted optical band gap with increasing Gd doping concentration. Co-doping with Al resulted in the presence of ferromagnetism and spin polarization. The electrical properties were improved by the incorporation of Al into Gd-doped ZnO thin films.
Article
Materials Science, Multidisciplinary
J. A. Garcia-Valenzuela, R. Rivera, A. B. Morales-Vilches, L. G. Gerling, A. Caballero, J. M. Asensi, C. Voz, J. Bertomeu, J. Andreu
Article
Nanoscience & Nanotechnology
Luis Villamagua, Richard Rivera, Darwin Castillo, Manuela Carini
Article
Chemistry, Physical
Frank Maldonado, Richard Rivera, Luis Villamagua, Jimmy Maldonado
APPLIED SURFACE SCIENCE
(2018)
Article
Materials Science, Multidisciplinary
Arvids Stashans, Patricio Puchaicela, Richard Rivera
JOURNAL OF MATERIALS SCIENCE
(2014)
Article
Physics, Applied
Arvids Stashans, Richard Rivera
MODERN PHYSICS LETTERS B
(2010)
Article
Physics, Condensed Matter
Frank Maldonado, Richard Rivera, Arvids Stashans
PHYSICA B-CONDENSED MATTER
(2012)
Article
Physics, Multidisciplinary
Richard Rivera, Arvids Stashans
Article
Physics, Multidisciplinary
Richard Rivera, Henry P. Pinto, Arvids Stashans, Lorena Piedra
Article
Chemistry, Inorganic & Nuclear
Richard Rivera, Arvids Stashans
SOLID STATE SCIENCES
(2010)
Article
Physics, Condensed Matter
Richard Rivera, Sandra Gonzalez, Arvids Stashans
SUPERLATTICES AND MICROSTRUCTURES
(2010)
Article
Chemistry, Physical
Frank Maldonado, Luis Villamagua, Richard Rivera
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Physics, Multidisciplinary
Luis Villamagua, Richard Rivera, Frank Maldonado, Jessica Cuesta, Carlos Tapia, Manuela Carini
Summary: The molecular adsorption of ethanethiol on the nonpolar ZnO surface was studied using density functional theory, with the presence of an oxygen vacancy triggering the appearance of an F-center. The analysis identified three different adsorption patterns, including dissociative and non-dissociative chemisorption with varying adsorption energies, as well as physisorption.
Article
Chemistry, Multidisciplinary
Noemi Cadmen, Joana Bustamante, Richard Rivera, F. Javier Torres, Jorge Ontaneda
Summary: This study investigates the adsorption mechanism of dopamine on the TiO2(110) surface using density functional theory. Through simulation and comparison with experimental data, it is found that dopamine adsorbs on the TiO2 surface in the form of bidentate enolate species, and the adsorption process is exothermic. The calculated results also suggest that dopamine molecules sit approximately upright on the surface, interacting with the pi-like orbitals of the aromatic ring, leading to a distorted configuration.
Proceedings Paper
Engineering, Multidisciplinary
R. Rivera, S. Jacome, F. Maldonado, A. Stashans
IAENG TRANSACTIONS ON ENGINEERING SCIENCES
(2014)